Heroku is the following: A Web Application Deployment Model: Heroku is designed to help developers build web apps and get them out into the world, without having to worry about managing servers, scaling operations, or juggling the deployment process.
The Little Ice Age was a period of cooling occurring after a warmer North Atlantic era known as the Medieval Warm Period or Medieval Climate Optimum.... ) and retreating during climate warming on moderate time scales.
The theoretical extent of these ice sheets during the ice age 1.5 mya is shown in white on the map below. (White area = maximum glacial extent 1.5 million years ago in the Pleistocene Epoch - Microsoft Encarta) Ice ages are said to have occurred every 150 million years, and last for at least 1 million years. According to the ice age theory, our current warm period will end with the beginning of another cold phase in 23,000 years time. Geologists claim that there have been 5 major ice ages. During ice ages the boundary of the ice sheet is hypothesised to spread and contract in cycles.